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Congress regulated hazardous waste from inception to disposal under the Resource Conservation and Recovery Act (RCRA) and EPA has developed a list of regulated substances [15]. However, RCRA does not regulate hazardous wastes involved in oil and gas extraction and production under RCRA Subtitle C. These materials are subject to state regulation under the less stringent RCRA Subtitle D solid waste regulations as well as other federal regulations, although states are also free to adopt more demanding provisions. In a publication regarding the exemption EPA says, “Although they are relieved from regulation as hazardous wastes, the exemption. | Reversing Water Pollution www.safewater.org 1 70 of the earth is covered by water but only 2 is drinkable fresh water One litre of wastewater pollutes about eight litres of freshwater. There is an estimated 12 000 km3 of polluted fresh water worldwide www.safewater.org 2 How is polluted water cleaned up It is not easy to reverse the effects of water pollution and it can be very expensive. There are two common ways to fix water that has been polluted a. Remove the pollution source b. Remove the contaminants .
